肖龙,杨国华,鲍丽芳,智腾飞,韩世军,王金梅.基于改进滑模频率偏移法的光伏孤岛检测研究[J].电测与仪表,2012,49(6):52-56. XIAO Long , YANG Guo-hua , BAO Li-fang , ZHI Teng-fei , HAN Shi-jun , WANG Jin-mei.Islanding Detection for PV Grid-connected System Based on Improved Slip-mode Frequency Shift[J].Electrical Measurement & Instrumentation,2012,49(6):52-56.
基于改进滑模频率偏移法的光伏孤岛检测研究
Islanding Detection for PV Grid-connected System Based on Improved Slip-mode Frequency Shift
Islanding detection is one of the essential functions for PV grid-connected system,the advantage and disadvantage of the detection performance directly relate to equipment safety.On the basis of summing up the current detection methods,aiming at the possibility of failure detection of Slip-Mode Frequency Shift(SMS),an improved Slip-Mode Frequency Shift(IM-SMS) algorithm is proposed.At first,the working principle of the IM-SMS algorithm is illustrated,then the parameter of IM-SMS algorithm is optimized and non-detection zone(NDZ) is analyzed.In the end,considering the impacts of different local load on islanding detection,Matlab/Simulink is used for setting up 5kW PV grid-connected system,and simulation study is processed afterward.The experimental results show that the proposed method can not only detect the islanding fast and accurate,but also reduce the NDZ.
